Incident Overview
During the landing roll, the airplane departed the runway following a failure of the right main landing gear to extend and lock into the down position. The operator reported that the event was caused by a mechanical failure of the right main gear actuator. The actuator had accumulated approximately 3,500 hours of total operating time at the time of the incident.
Maintenance History
A review of the maintenance records revealed no open discrepancies. All gear extension and retraction tests conducted during several 100-hour inspections, as well as the most recent annual inspection, indicated that the gear retraction and extension functions checked 'normal.' No pre-existing issues with the landing gear system were documented.
Technical Details
The right main gear actuator failed during the landing sequence, preventing the gear from achieving the locked-down configuration. As a result, the aircraft was unable to maintain directional control on the runway and exited the paved surface during the landing roll. The specific nature of the mechanical failure was not elaborated upon in the source material.